linux-kernel - Re: [PATCH 12/13] cpufreq: Add cpufreq driver for Tegra124

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 11 Jul 2014 17:14:10 +0300
From:	Tuomas Tynkkynen <ttynkkynen@...dia.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
CC:	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Mike Turquette <mturquette@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 12/13] cpufreq: Add cpufreq driver for Tegra124



On 11/07/14 07:35, Viresh Kumar wrote:
> Hi Tuomas,
>
> On 11 July 2014 03:12, Tuomas Tynkkynen <ttynkkynen@...dia.com> wrote:
>> Add a new cpufreq driver for Tegra124. Instead of using the PLLX as
>> the CPU clocksource, switch immediately to the DFLL. It allows the use
>> of higher clock rates, and will automatically scale the CPU voltage as
>> well. We also rely on the DFLL driver to determine the CPU clock
>> frequencies that the chip supports, so that we can directly build a
>> cpufreq table with the OPP library helper dev_pm_opp_init_cpufreq_table.
>>
>> This driver is a completely independent of the old cpufreq driver
>> (tegra-cpufreq), which is only used on Tegra20.
>>
>> Signed-off-by: Tuomas Tynkkynen <ttynkkynen@...dia.com>
>
> Please reuse cpufreq-cpu0 instead of adding a new driver. Similar
> is being adopted by all platforms now: krait, mvebu, etc..
>

Sure, I can do the CPU clock parent change first and then instantiate 
the cpufreq-cpu0 driver, like highbank-cpufreq. That'll depend on the 
patch 'cpufreq: cpu0: OPPs can be populated at runtime' from your 
'Extend support beyond CPU0' series though, any idea when that patch 
will land in?


-- 
nvpublic
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/